Question

Which step did this student do wrong?

Answer 1

Step 1

Explanation:

When the student first removed the parenthesis by multiply it by 7, he forget to multiply 5 by seven. So instead of x + 3 + 7x - 35, he got what you see on the picture before you.

Answer 2

Step 1: The student forgot to multiply 7 and -5. Hope this helps :)